- Companies
- Plumbers and heating engineers
- Cardiff
- GSG Plumbing and Heating Ltd
GSG Plumbing and Heating Ltd
- Company number
- 16501299
- Incorporated
- 6 Jun 20251 year trading
- Registered office
- 37 Dorchester Avenue, Penylan, Cardiff, CF23 9BS
- Nature of business
- Plumbing, heat and air-conditioning installation
GSG Plumbing and Heating Ltd is a 1-year-old private limited company registered in Cardiff, company number 16501299, one of 170 plumbing and heating companies in Cardiff. Its next accounts are due at Companies House on 28 February 2027, and the CT600 for the period to 31 May 2026 is due at HMRC on 31 May 2027.
Key dates
This company has not filed accounts yet. First accounts are due 21 months after incorporation, and the first period can run longer than a year.
Is this your company?
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Where GSG Plumbing and Heating Ltd is registered
The registered office is in Cardiff (CF23), in the Cardiff local authority area, Wales. Show CF23 9BS on a map.
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What happens if GSG Plumbing and Heating Ltd files late
Companies House charges an automatic penalty the day after the deadline, and it rises the longer the accounts are late. These are the dates for this company's accounts due on 28 February 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Mar 2027 to 31 Mar 2027 | £150 |
| 1 to 3 months late | 1 Apr 2027 to 31 May 2027 | £375 |
| 3 to 6 months late | 1 Jun 2027 to 31 Aug 2027 | £750 |
| More than 6 months late | From 1 Sep 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jun 2027 | £200 |
| 3 months late | 31 Aug 2027 | another £200 |
| 6 months late | 30 Nov 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 May 2028 | another 10% of any unpaid tax |
For returns filed on or after 1 April 2026. Late three times in a row and the £200 penalties become £1,000 each.
Company details
As held on the Companies House register.
- Company number
- 16501299
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 6 June 2025 (1 year ago)
- Registered office
- 37 Dorchester Avenue, Penylan, Cardiff, CF23 9BS
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 May (accounting reference date)
- Accounts type
- No accounts filed yet
- Last confirmation statement
- 5 June 2026
Filing notes for plumbing and heating companies
Plumbing and heating companies frequently work under CIS for main contractors and also directly for homeowners, so turnover can mix CIS and non-CIS income.
Similar companies in Cardiff
Other active plumbing and heating companies registered in Cardiff.
- GT Underfloor Heating Limited2020
- H.Herbert Plumbing Services Ltd2022
- H20 Plumbing 'N' Heating Limited2018
- Ha Construction Works Ltd2026
- Heat Elite Cardiff Ltd2024
- Heat Safe Cardiff Ltd2018
- Heat Tec SW Ltd2021
- Heatcare (Cardiff) Ltd2013
All plumbing and heating companies in Cardiff · All trades in Cardiff · Plumbers and heating engineers across the UK
Frequently asked questions
When are GSG Plumbing and Heating Ltd's accounts due?
GSG Plumbing and Heating Ltd's next accounts are due at Companies House by 28 February 2027 (in 138 days), covering the period to 31 May 2026.
When is GSG Plumbing and Heating Ltd's CT600 due?
The CT600 for the period to 31 May 2026 is due at HMRC by 31 May 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 March 2027.
Is GSG Plumbing and Heating Ltd still trading?
GSG Plumbing and Heating Ltd is listed as active on the Companies House register as of 1 Oct 2026. Active means it has not been dissolved or entered insolvency; it does not show whether it is currently taking on work.
What does GSG Plumbing and Heating Ltd do?
GSG Plumbing and Heating Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is GSG Plumbing and Heating Ltd?
GSG Plumbing and Heating Ltd was incorporated on 6 June 2025, 1 year ago.
What is the penalty if GSG Plumbing and Heating Ltd files its accounts late?
Companies House charges £150 if the accounts are up to 1 month late, £375 up to 3 months, £750 up to 6 months and £1,500 after that, doubled if the previous year's accounts were also late. HMRC charges £200 for a CT600 filed a day late and another £200 at 3 months.
Official records
View GSG Plumbing and Heating Ltd on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026). Deadlines are worked out from the register and assume a standard accounting period; a change of year end or a short period moves them. This page is general information, not tax or accountancy advice.